In [5]:
import altair as alt
import pandas as pd
alt.data_transformers.disable_max_rows()
url = "https://raw.githubusercontent.com/UIUC-iSchool-DataViz/is445_data/main/building_inventory.csv"
data = pd.read_csv(url)
filtered_data1 = data[(data['Total Floors'] > 0) & (data['Total Floors'] < 10)]
viz1 = alt.Chart(filtered_data1).mark_line().encode(
    x=alt.X('Total Floors:O', title='Number of Floors'), 
    y=alt.Y('count():Q', title='Number of Buildings') 
)
viz1
Out[5]:
In [11]:
brush = alt.selection(type='interval', encodings=['x'])
filtered_data2 = data[data['Year Acquired'] > 0]
viz2 = alt.Chart(filtered_data2).mark_bar().encode(
    x=alt.X('Year Acquired:Q', title='Year Acquired'),
    y=alt.Y('sum(Square Footage):Q', title='Total Square Footage'),
    color=alt.condition(brush, alt.value('steelblue'), alt.value('grey'))
).add_selection(brush)
viz2

/opt/conda/lib/python3.8/site-packages/altair/utils/deprecation.py:65: AltairDeprecationWarning: 'selection' is deprecated.
   Use 'selection_point()' or 'selection_interval()' instead; these functions also include more helpful docstrings.
  warnings.warn(message, AltairDeprecationWarning, stacklevel=1)
/opt/conda/lib/python3.8/site-packages/altair/utils/deprecation.py:65: AltairDeprecationWarning: 'add_selection' is deprecated. Use 'add_params' instead.
  warnings.warn(message, AltairDeprecationWarning, stacklevel=1)
Out[11]:
In [12]:
viz3=viz1.transform_filter(brush)
viz4 = alt.hconcat(viz3, viz2)
viz4
Out[12]:
In [13]:
viz4.save('viz4.html')
In [ ]: